upd64a Renesas Electronics Corporation., upd64a Datasheet - Page 13

• Manufacturer Part Number: upd64a
• Description: 4-bit Single-chip Microcontroller For Infrared Remote Control Transmission
• Manufacturer: Renesas Electronics Corporation.

2.9.2 Carry flag (CY)
The carry flag is set (1) in the following cases.
• If the ANL instruction or the XRL instruction is executed when bit 3 of the accumulator is “1” and bit 3 of the
• If the RL instruction or the RLZ instruction is executed when bit 3 of the accumulator is “1”.
• If the INC instruction or the SCAF instruction is executed when the value of the accumulator is 0FH.
The carry flag is cleared (0) in the following cases.
• If the ANL instruction or the XRL instruction is executed when either bit 3 of the accumulator or bit 3 of the
• If the RL instruction or the RLZ instruction is executed when bit 3 of the accumulator is “0”.
• If the INC instruction or the SCAF instruction is executed when the value of the accumulator is other than 0FH.
• If the ORL instruction is executed.
• When data is written to the accumulator by the MOV instruction or the IN instruction.
operand is “1”.
operand (or both) is “0”.
Data Sheet U14380EJ3V0DS00
PD64A, 65
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